Bipyridine Periodic Mesoporous Organosilica: A Solid Ligand for the Iridium-Catalyzed Borylation of CH Bonds
作者:Wolfram R. Grüning、Georges Siddiqi、Olga V. Safonova、Christophe Copéret
DOI:10.1002/adsc.201400125
日期:2014.3.10
With the goal to obtain a molecularly defined iridium(I) heterogeneous CH functionalization catalyst, a periodic mesoporous organosilica (PMO) containing bipyridylene moieties in a matrix of biphenylene units as ligand platform was designed and fully characterized. The material exhibits a high surface area with small mesopores in a vermicular arrangement, and the pore walls show a highly crystal‐like
为了获得分子定义的铱(I)异质CH官能化催化剂,设计并充分表征了在联苯单元的基质中含有联吡啶部分的周期性介孔有机硅(PMO)。该材料具有高表面积,在蠕虫状排列中具有小的中孔,并且孔壁显示出高度的晶体状特征。用三甲基氯硅烷进行表面钝化并用氯(1,5-环辛二烯)铱(I)二聚体[IrCl(COD)} 2 ]官能化后,根据EXAFS和UV-Vis光谱学获得了分子定义的Ir(I)表面配合物。这种功能化的材料催化直接C芳烃的氢硼化以产生相应的硼酸酯,并且可以在不显着损失活性的情况下重复使用。